Autofill doesn't let me type my equations

Hello. Recently I ran into a problem where I can’t write my equations properly because autofill won’t let me, and whenever I try to delete the errors that autofill made it will do the same thing after I select anywhere outside of the equation text box. I’m trying to type set-builder notation. Here’s an example: {x|-4<x<7}. When I try to use the character “|” autofill will put the character on the other side as well thinking I’m trying to do absolute value. When I delete the other character it will reappear again. This happened on two computers and I have autofill settings turned off for both computers. It’s an error with Kami. Please help!